But there’s been a slow decline from their immediate post-election highs and the most recent polls have the two main parties essentially neck and neck.

In Scotland and Wales there are fewer polls to go on but, based on the available evidence, the patterns in both are different from Great Britain as a whole.

Labour has seen improvement everywhere – again, with most of the rise occurring during the election campaign.

But in Scotland this has largely come at the expense of the SNP, and in Wales from UKIP.

This could be evidence of former Labour voters who had switched to those parties returning to the fold.

The approval ratings for Theresa May and Jeremy Corbyn over the course of the year follow a similar pattern to voting intention, but the movements are more exaggerated.

The graph shows the net approval scores in Opinium’s polling series – in other words it’s the percentage of people who say they approve of each leader minus the percentage who say they disapprove.

Mrs May started the year with a positive score which went up in the months before the election was called. It then wobbled a bit in the first few weeks of the campaign before going into a precipitous decline.

One finding is that people have become more pessimistic over the course of the year about the likely outcome of Brexit negotiations.

They’ve also become more negative in their assessment of how the government is handling the talks.

It should be noted, however, that the latest figures are from October – before the December breakthrough in negotiations.

It’s quite possible that this will lead to an increase in optimism and more positive assessments of the government’s performance.

Either way, there’s not really any clear evidence of any significant shift in voters’ basic view either in favour or against Brexit.

YouGov have regularly been polling throughout the year on whether Britain was right or wrong to vote to leave the EU. As the graph shows, there has been very little movement.

It’s true that at the start of the year ‘Right’ was generally a few points ahead whereas at the end of the year it’s been ‘Wrong’ slightly ahead. But any genuine change is very small.

The only safe conclusion from this evidence is that the country remains roughly equally split on this issue.

Other pollsters have mostly had similar figures.

One poll published just a week ago by BMG, using the actual referendum question from 2016, did suggest a bigger shift.

That put Remain on 51% and Leave on 41%, with 7% undecided and 1% preferring not to say.

This is just a single poll, though, as BMG point out themselves. And it was mostly conducted when talks in Brussels seemed to be stuck over the issue of the Irish border. It does not overturn the more consistent picture.

It’s tempting to say, as somebody once put it, that on support for Brexit nothing has changed.